Hot-air heater.



J. Q. CLARKE. HOT AIR HEATER. APPLIGATION FILED DEO.15, 191s.

Patented Nov. 10, 1914.

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I @3207?- ZA 2 m THE NORRIS PETERS 60.. PHO70-LITHO.. WASHINGTON. D. C.

J. Q. CLARKE. HOT AIR HEATER.

APPLIOATION FILED 0170.15, 1913.

1,116,674 Patented Nov. 10, 1914.

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. UJZMQM MZLW 1 THE NORRIS PETERS CO. PH010-LITHO.. WASHINGTON. D. c

umrnn sTAr nsrAtrEnrr OFFICE.

Jenn a. CL R E, oaceawronnsvlnnn, INDIANA.

HOT-AIR HEATER.

To all whom it may concern: 1

Be it known that 1, JOHN Q. CLARKE, a citizen of the United States, residing at Zrawfordsville, in the county of Montgomery and State of Indiana, have invented certain new and useful Improvement s,inHot- Air Heaters, of Which the following is a specification.

My invention relates to certain improveinents in hot-air heaters and has for its object the production of unimproved apparatus of theabove described character more particularly intended for the heating of small dwellings, conveyances, etc, and to this end my invention consists in the peculiar construction, combination and arrangement of the several parts as will be more fully set forth in the following description and claims.

Referring to the accompanying drawings,

. forming a part ofthis application, in Which like letters and numerals of reference indicate corresponding parts throughout the several views: Figure 1 is a front elevation of my inventionentire, illustrating an approved manner of attaching it directly to the floor of a small dwelling, conveyance, etc. Fig. 2 is a bottom plan of my invention entire. Fig. 3 is a vertical half section of the same, taken on the section line M, N, Fig. 2. Fig. f is a top plan of the removable, lining grate. Fig. 5 is a rear end plan of the fire box shell, illustrating the baffle plate and the removable, lininggrate in normal position therein. i

In the formation of the rigid casing of my invention I employ an outer shell A, an inner shell 13, a front casting C, a back casting D and a top casting E. The outer shell A is bent U-shaped and provided With a parallel series of circumferential corrugations a having elongatedair inlets athrough their underside for purposes tobe presently described. The inner shell B nests securely Within the outer shell. A. and forms a circumferentially continuous U-shaped Wall which normally rests against the Wall of the outer shell A for providing a suitable combustion chamber or lire box 7). The outcr and inner shells are preferably formed of integral strips of bent sheet metal and have their vertical edges seated in the usual manner in ordinary retaininggrooves in the front rods F. a

i The upper portions of the outer shell A, front casting C and back casting D are extended an approved distance above the upper portion of the inner shell ll for suitably providing What I nominate a hot-air cham- Specification of Iittrs Patent. P t t 9 Application filed December 15, 1913. Serial No. 808,934.

her G. The top casting E is rectangular in outline andhas a rim 0, a downstanding flange c and a series of openings Within the area described by the downstandiug flange 0 through which the heated air from the hot-air chamber Gr passes to the open room or other iuclosures for heating purposes. The flange 0 extends downward into the hot-air chamber G and against the inner wall of the upper portions of the outer shell A, front casting C and back casting D and said parts are securely joined together by suitably disposed through-bolts H. The rim (2 securely covers the upper edge of the outer shell, front casting U and back casting D and provides a suitable connection for attaching my apparatus to the floor of a dwelling, conveyance, etc, as shown in Fig.1.,

1 represents the flooring and J the sleepers of an ordinary. dwelling, conveyance, etc, to which the body of my apparatus is suitably connected. It will be readily observed here that any other manner of attachment or support may be suitably adopted as its use may occasion and require.

The fire box 5 is PIOVlClBClWlllll a removable, lining grate K of integral construction which normally rests upon the bottom of the inner shell 13.: The lining grate K by preference of integral casting comprises a rectangular body portion K, an upstanding flange l2 suitably extended around the upper periphery of the body portion, a parallel series of elongated openings it" through the central area of the body portion, a segment? shaped back leg k at the rear underside of the body portion and a closed front and rear portion is of the body portion. The rectangular body portion K ofthe lining grate divides the area Within the inner shell 13 i wall of said shell. The elongated openings is" provide suitable passages which permit the air to pass through intothe combustion chamber b above the c1nders, ashes, etc, to

pass through into the ash pit below. The segment-shaped back leg normally rests upon the bottom of the inner shell B and across the ash pit for clearing it of cinders, ashes, etc, by longitudinally moving the lining grate within or from said inner shell B. The closed front and rear portions la of the lining grate completely disconnect front and rear portions of the combustion chamber 6 and the ash pit b and compel the air current .to pass directly up through the elongated openings in into the combustion chamber Z) and into the fuel upon said lining grate.

The front casting C is provided with an annular fuel opening 0, an annular-like lip 0 and a hinged sectional door L. The annular fuel opening 0 is arranged with its lower periphery flush with the lower wall of the inner shell B and the annular-like lip c is arranged flush with the lower periphery of the fuel opening 0 which serves as a hopper-like door opening for the ash pit 6 The hinged sectional door comprises a main section L provided with an ordinary hinge f and latch f for suitably connecting it with the front casting as illustrated in Fig. 1 and a lip section 7 provided with an ordinary hinge f for suitably connecting it with the main section as shown in Figs. 1 and 3. The lip section f is arranged to normally cover and rest upon the periphery of the annular-like lip 0 of the front casting and is provided with an ordinary eyelet f for attaching a suitable lift chain or rod. It will be readily observed here that this novel construction of the hinged sectional door permits the entire door to be swung horizontally and the lip section f to be swung vertically as their use may respectively occasion and require for fueling the combustion chamber 6, clearing the ash pit b of cinders, ashes, etc., and for controlling the admission of air thereto and when closed and latched that it securely retains the lining grate K in the inner shell B and normally rests upon the annular-like lip c of the front casting. The back casting D is provided with an oval collar (Z having a flue opening (Z' for connecting the combustion chamber 6 with the open air in the usual manner.

0 represents a baflie plate, preferably formed of an integral strip of bent sheet metal, transversely arranged across the upper rear portion of the combustion chamber 1) and rigidly secured to the upper inner wall of the inner shell B adiacent the flue opening d as illustrated in Figs-3 and 5. It will be observed here that the baffle plate 0 retains the heat in the upper portion of the combustion chamber Z) and deflects the air current downward and around its lower edge before the current can pass out through the flue opening (1 to the open air.

The novel construction and arrangement of the outer shell A and the inner shelfB as detailed hereinbefore suitably provides between the walls of said shells what I term a parallel series of circumferential air conduits p which connect the elongated air inlets a' at the underside of the outer shell with the hot-air chamber G for conveying the air from the elongated inlets around and over the inner shell B into said hot-air chamber G from which it passes through the openings 6 of the top casting E into the open room or other inclosures for heating purposes.

Although I do not show or describe any conduit or controlling apparatus for connecting, cutting-on or cutting-ofl the hot air of the hot-air chamber G of my apparatus with a plurality of rooms or other inclosures, it will be readily apparent that Imay provide such attachments in the usual or in any approved manner as occasion may require.

In the novel construction, combination and arrangement of my improved apparatus as disclosed hereinbefore I produce a convenient, durable and sanitary hot-air heater of much advantage and economyin the heating of small dwellings, conveyances, etc. 1

Having thus fully described my invention and set forth the operation and advantages of its several partswhat I claim as new and desire to secure by Letters Patent is,

1. In an apparatus of the class described,

an air heater casing comprising a U-shaped outer shell having a parallel series of circumferential corrugations provided with air inlets through their underside, a U-shaped inner shell normally nesting within and against the wall of the outer shell, end castings securely fitted and joined to the vertical edges of said shells by tie rods suitably disposed through said castings, said castings and said outer shell having upper portions extended an approved distance above the upper wall of the inner shell, a top casting securely fitted and joined to the horizontal edge of the upper portions of said end castings and said outer shell by through bolts suitably disposed therein, the inner shell forming in connection with the end castings a combustion chamber suitably inclosed by the walls of said parts, the upper portions of the outer shell and of the end castings forming in connection with the top casting and the upper wall of the inner shell a hot air'chamher suitablyinclosed by the walls of said parts, the circumferential corrugations and the elongated inlets of the outer shell forming in connection with the adjoining wall ofthe inner shell a parallel able supply of heated air and means in said top casting for discharging the heated air from said hot air chamber into the open apartment for heating purposes, substantially as specified.

2. In an apparatus of the class described, a fire box comprising a circumferentially continuous U-shaped shell, front and back castings connected with said shell, an annular fuel opening in the front casting having its lower periphery arranged flush with the bottom of said shell, a removable lining grate normally nesting in and horizontally dividing the area within said shell. into a combustion chamber in the upper portion and into an ash pit in the lower portion and having a rectangular body portion pro vided with an upstanding flange suitably extended around its upper periphery, a parallel series of elongated openings through its central area, a segment-shaped back leg atits rear underside, a closed front portion and a closed rear portion for respectively controlling said combustion chambenand said ash pit in the manner set forth, a batlie plate securely arranged within said shell transversely across the upper rear portion of the combustion chamber, suitable provisions in the back casting adjacent said ballie plate for connecting the combustion chamber in the usual manner with the open air and means for suitably closing said annular fuel opening in the front casting, substantially as specified.

3. In an apparatus of the class described, the combination with a fire box having a circumferentially continuous U-shaped shell and front and back castings connected with said shell, of a removable lining grate normally nesting in and horizontally dividing the area within said shell into a combustion chamber in the upper portion and into an ash pit in the lower portion and having a rectangularbody portion provided with an upstanding flange suitably extended around its upper periphery, a parallel series of elongated openings through its central area, a segment-shaped back leg at its rear underside and a closedfront portion and a closed rear portion for respectively controlling said combustion chamber and said ash pit in the manner and for the purposes set forth.

4. In an apparatus of the class described, the combination with a fire box l'iaving a circumferentially continuous U-shaped shell and front and back castings connected with said shell, of a front casting provided with an annular fuel opening and an annularlike lip forming a hopper-like door at the bottom of said fuel opening and a sectional door having a main section suitably hinged upon said front casting for the purpose set forth and a lip section suitably hinged upon said main section and adapted to normally cooperatewith the hopper-like door of said fuel opening for the purpose described and suitable means for manually operating said sections for the purposes set forth, substantially as specified.

5. In an apparatus of the class described, the combination of a U-shaped outer shell having a parallel series of circui'n'lerential corrugations provided with air inlets through their underside, a circumferentially continuous U-shaped inner shell normally nesting within and against the wall. of the outer shell, end castings securely fitted and joined to the vertical edges of said shells, said castings and said outer shell having upper portions extending an approved distance above the upperwall of the inner shell, a top casting securely fitted and joined to the horizontal edge of said upper portions, the inner shell forming in connection with said end castings a fire boX, a removable lining g'ate normally nesting in and horizontally dividing the area within said inner shell into a combustion chamber in the upper portion and into an ash pit in the lower portion and having a rectangular body portion formed in the manner and for the purposes set forth, the upper portions of said end castings and. said outer shell forming in connection with the top casting and the upper wall of the inner shell a hot air chamber, the circumferential corrugations and the elongated inlets of said outer shell forming in connection with the adjoining wall of the inner shell a parallel series of circumferential air conduits for the purpose described, means in said top casting for connecting the hotair chamber with the open apartment for the purpose specified,

means in the back casting for connecting said combustion chamber in the usual manner with the open air, and the front casting having an annular fuel opening arranged with its lower periphery flush with the bot" tom of said inner shell and means for suitably closing and controllingsaid fuel openling, substantially as specified. a JOHN Q. CLARKE. W'itnesses G. "W. 'PEYTON. N. R. KIRTLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents, Washington, D. C. 

